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pinMode()
Description
Configures the specified pin to behave either as an input or an output. See the Digital Pins page for details on the functionality of the pins.
As of Arduino 1.0.1, it is possible to enable the internal pullup resistors with the mode INPUT_PULLUP. Additionally, the INPUT mode explicitly disables the internal pullups.
Syntax
pinMode(pin, mode)
Parameter Values
- pin: the Arduino pin number to set the mode of.
- mode: INPUT, OUTPUT, or INPUT_PULLUP. See the Digital Pins page for a more complete description of the functionality.
Return Values
- Nothing
Example Code
The code makes the digital pin 13 OUTPUT and Toggles it HIGH and LOW
void setup() {
pinMode(13, OUTPUT); // sets the digital pin 13 as output
}
void loop() {
digitalWrite(13, HIGH); // sets the digital pin 13 on
delay(1000); // waits for a second
digitalWrite(13, LOW); // sets the digital pin 13 off
delay(1000); // waits for a second
}
※ NOTES AND WARNINGS:
The analog input pins can be used as digital pins, referred to as A0, A1, etc. The exception is the Arduino Nano, Pro Mini, and Mini's A6 and A7 pins, which can only be used as analog inputs.
void setup() {
pinMode(A5, OUTPUT); // sets the digital pin A5 as output
}
void loop() {
digitalWrite(A5, HIGH); // sets the digital pin A5 on
delay(1000); // waits for a second
digitalWrite(A5, LOW); // sets the digital pin A5 off
delay(1000); // waits for a second
}
See Also
- Language : digitalRead()
- Language : digitalWrite()
- Example : Arduino - Button
- Example : Arduino - LED Blink
- Example : Description of the digital pins
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